LT1634 Micropower Precision Shunt Voltage Reference U DESCRIPTION FEATURES ■ ■ ■ ■ ■ ■ ■ Initial Voltage Accuracy: 0.05% Low Operating Current: 10µA Low Drift: 10ppm/°C Max Less Than 1Ω Dynamic Impedance Available in 1.25V, 2.5V, 4.096V and 5V in SO-8 and TO-92 Packages 1.25V and 2.5V Available in MSOP Package Both Commercial and Industrial Temperature Range Parts Are Available The LT ®1634 is a micropower, precision, shunt voltage reference. The bandgap reference uses trimmed precision thin film resistors to achieve 0.05% initial voltage accuracy. Improved curvature correction technique guarantees 10ppm/°C maximum temperature drift. Advances in design, processing and packaging techniques guarantee 10µA operation and low temperature cycling hysteresis. The LT1634 does not require an output compensation capacitor, but is stable with capacitive loads. Low dynamic impedance makes the LT1634 reference easy to use from unregulated supplies. Portable Meters Precision Regulators A/D and D/A Converters Calibrators The LT1634 reference can be used as a high performance upgrade to the LM185/LM385, LT1004 and LT1034 where lower power and guaranteed temperature drift is required. U APPLICATIONS ■ ■ ■ ■ , LTC and LT are registered trademarks of Linear Technology Corporation. U TYPICAL APPLICATION Super Accurate ±4.096V Output References 5V 45k + LT1634-4.096 VOUT 4.096V LT1495 Temperature Drift – 2.0 – 5V 5 IS = 200µA OUTPUT ACCURACY BETTER THAN 0.075% AT ±500µA OUTPUT LTC®1043 REVERSE VOLTAGE CHANGE (mV) 5V 4 6 1µF 15 18 17 – 5V IR = 10µA VOUT = 1.25V 1.0 0.5 0 – 0.5 –1.0 –1.5 –2.0 – 40 –20 5V – LT1495 1.5 VOUT – 4.096V 20 40 60 0 TEMPERATURE (°C) 80 100 1634 TA02 + 1µF – 5V 1634 TA01 1 LT1634 W W U W ABSOLUTE MAXIMUM RATINGS Operating Current 1.25V ............................................................. 100mA 2.5V ................................................................. 50mA 4.096V, 5V........................................................ 30mA Forward Current................................................... 20mA Operating Temperature Range Commercial ............................................. 0°C to 70°C Industrial ............................................ – 40°C to 85°C Storage Temperature Range (Note 1) ... – 65°C to 150°C Lead Temperature (Soldering, 10 sec).................. 300°C U W U PACKAGE/ORDER INFORMATION TOP VIEW TOP VIEW DNC* DNC* DNC* GND 1 2 3 4 8 7 6 5 DNC* DNC* VOUT TEST** DNC* 1 8 DNC* DNC* 2 7 DNC* DNC* 3 6 VOUT GND 4 MS8 PACKAGE 8-LEAD PLASTIC MSOP 5 TEST** S8 PACKAGE 8-LEAD PLASTIC SO TJMAX = 125°C, θJA = 190°C/ W TJMAX = 125°C, θJA = 250°C/ W ORDER PART NUMBER MS8 PART MARKING ORDER PART NUMBER S8 PART MARKING LT1634BCMS8-1.25 LT1634BCMS8-2.5 LTCV LTDF LT1634ACS8-1.25 LT1634ACS8-2.5 LT1634ACS8-4.096 LT1634ACS8-5 LT1634AIS8-1.25 LT1634AIS8-2.5 LT1634AIS8-4.096 LT1634AIS8-5 LT1634BCS8-1.25 LT1634BCS8-2.5 LT1634BCS8-4.096 LT1634BCS8-5 LT1634BIS8-1.25 LT1634BIS8-2.5 LT1634BIS8-4.096 LT1634BIS8-5 634A1 634A2 634A4 634A5 634AI1 634AI2 634AI4 634AI5 634B1 634B2 634B4 634B5 634BI1 634BI2 634BI4 634BI5 BOTTOM VIEW 3 2 TEST** VOUT 1 GND ORDER PART NUMBER LT1634CCZ-1.25 LT1634CCZ-2.5 LT1634CCZ-4.096 LT1634CCZ-5 Z PACKAGE 3-LEAD PLASTIC TO-92 TJMAX = 125°C, θJA = 190°C/ W *Connected internally. Do Not Connect external circuitry to these pins. **Connect to ground in user application. Consult factory for Military grade parts. 2 LT1634 U AVAILABLE OPTIO S PACKAGE TYPE ACCURACY (%) TEMPERATURE COEFFICIENT (ppm/°C) 0°C to 70°C 0.05 10 LT1634ACS8-1.25 LT1634ACS8-2.5 LT1634ACS8-4.096 LT1634ACS8-5 – 40°C to 85°C 0.05 10 LT1634AIS8-1.25 LT1634AIS8-2.5 LT1634AIS8-4.096 LT1634AIS8-5 0°C to 70°C 0.05 25 – 40°C to 85°C 0.05 25 0°C to 70°C 0.20 25 TEMPERATURE MS8 LT1634BCMS8-1.25 LT1634BCMS8-2.5 1.25V ELECTRICAL CHARACTERISTICS S8 Z LT1634BCS8-1.25 LT1634BCS8-2.5 LT1634BCS8-4.096 LT1634BCS8-5 LT1634BIS8-1.25 LT1634BIS8-2.5 LT1634BIS8-4.096 LT1634BIS8-5 LT1634CCZ-1.25 LT1634CCZ-2.5 LT1634CCZ-4.096 LT1634CCZ-5 (Note 2) PARAMETER CONDITIONS MIN TYP MAX Reverse Breakdown Voltage LT1634ACS8/LT1634BCMS8/LT1634BCS8/ LT1634AIS8/LT1634BIS8 (IR = 10µA) 1.24937 – 0.05 1.250 1.25062 0.05 V % LT1634CCZ (IR = 10µA) 1.24750 – 0.20 1.250 1.25250 0.20 V % Reverse Breakdown Change with Current (Note 3) UNITS LT1634ACS8 (IR = 10µA) ● 1.24849 – 0.12 1.250 1.25149 0.12 V % LT1634AIS8 (IR = 10µA) ● 1.24781 – 0.175 1.250 1.25218 0.175 V % LT1634BCS8/LT1634BCMS8 (IR = 10µA) ● 1.24718 – 0.225 1.250 1.25281 0.225 V % LT1634BIS8 (IR = 10µA) ● 1.24547 – 0.362 1.250 1.25453 0.362 V % LT1634CCZ (IR = 10µA) ● 1.24531 – 0.375 1.250 1.25469 0.375 V % ● 0.25 0.30 1 2 mV mV ● 2 2 8 10 mV mV 7 µA 10µA ≤ IR ≤ 2mA 2mA ≤ IR ≤ 20mA Minimum Operating Current ● Temperature Coefficient LT1634A, IR = 10µA LT1634B, IR = 10µA Reverse Dynamic Impedance (Note 4) 10µA ≤ IR ≤ 2mA ● ● 4 10 10 25 ppm/°C ppm/°C ● 0.125 0.150 0.5 1.0 Ω Ω Low Frequency Noise (Note 5) IR = 10µA, 0.1Hz ≤ f ≤ 10Hz 10 µVP-P Hysteresis (Note 6) ∆T = – 40°C to 85°C ∆T = 0°C to 70°C 160 40 ppm ppm 3 LT1634 2.5V ELECTRICAL CHARACTERISTICS (Note 2) PARAMETER CONDITIONS MIN TYP MAX Reverse Breakdown Voltage LT1634ACS8/LT1634BCMS8/LT1634BCS8/ LT1634AIS8/LT1634BIS8 (IR = 10µA) 2.49875 – 0.05 2.500 2.50125 0.05 V % LT1634CCZ (IR = 10µA) 2.49500 – 0.20 2.500 2.50500 0.20 V % Reverse Breakdown Change with Current (Note 3) UNITS LT1634ACS8 (IR = 10µA) ● 2.49700 – 0.12 2.500 2.50300 0.12 V % LT1634AIS8 (IR = 10µA) ● 2.49562 – 0.175 2.500 2.50437 0.175 V % LT1634BCMS8/LT1634BCS8 (IR = 10µA) ● 2.49437 – 0.225 2.500 2.50562 0.225 V % LT1634BIS8 (IR = 10µA) ● 2.49094 – 0.362 2.500 2.50906 0.362 V % LT1634CCZ (IR = 10µA) ● 2.49062 – 0.375 2.500 2.50937 0.375 V % ● 0.30 0.40 1.5 3.0 mV mV ● 2 2 8 10 mV mV 8 µA ppm/°C ppm/°C 10µA ≤ IR ≤ 2mA 2mA ≤ IR ≤ 20mA Minimum Operating Current ● Temperature Coefficient LT1634A, IR = 10µA LT1634B, IR = 10µA Reverse Dynamic Impedance (Note 4) 10µA ≤ IR ≤ 2mA ● ● 4 10 10 25 ● 0.15 0.20 0.75 1.50 Ω Ω Low Frequency Noise (Note 5) IR = 10µA, 0.1Hz ≤ f ≤ 10Hz 15 µVP-P Hysteresis (Note 6) ∆T = – 40°C to 85°C ∆T = 0°C to 70°C 160 40 ppm ppm 4.096V ELECTRICAL CHARACTERISTICS (Note 2) PARAMETER CONDITIONS MIN TYP MAX Reverse Breakdown Voltage LT1634ACS8/LT1634BCS8/ LT1634AIS8/LT1634BIS8 (IR = 20µA) 4.09395 – 0.05 4.096 4.09805 0.05 V % LT1634CCZ (IR = 20µA) 4.08780 – 0.20 4.096 4.10419 0.20 V % Reverse Breakdown Change with Current (Note 3) LT1634ACS8 (IR = 20µA) ● 4.09108 – 0.12 4.096 4.10091 0.12 V % LT1634AIS8 (IR = 20µA) ● 4.08883 – 0.175 4.096 4.10317 0.175 V % LT1634BCS8 (IR = 20µA) ● 4.08678 – 0.225 4.096 4.10522 0.225 V % LT1634BIS8 (IR = 20µA) ● 4.08115 – 0.362 4.096 4.11085 0.362 V % LT1634CCZ (IR = 20µA) ● 4.08064 – 0.375 4.096 4.11137 0.375 V % ● 0.3 0.4 1.5 3.0 mV mV ● 2 2 8 10 mV mV 15 µA 20µA ≤ IR ≤ 2mA 2mA ≤ IR ≤ 20mA Minimum Operating Current 4 UNITS ● LT1634 4.096V ELECTRICAL CHARACTERISTICS PARAMETER CONDITIONS Temperature Coefficient LT1634A, IR = 20µA LT1634B, IR = 20µA Reverse Dynamic Impedance (Note 4) 20µA ≤ IR ≤ 2mA (Note 2) MIN TYP MAX UNITS ● ● 4 10 10 25 ppm/°C ppm/°C ● 0.15 0.20 0.75 1.50 Ω Ω Low Frequency Noise (Note 5) IR = 20µA, 0.1Hz ≤ f ≤ 10Hz 30 µVP-P Hysteresis (Note 6) ∆T = – 40°C to 85°C ∆T = 0°C to 70°C 160 40 ppm ppm 5V ELECTRICAL CHARACTERISTICS (Note 2) PARAMETER CONDITIONS MIN TYP MAX Reverse Breakdown Voltage LT1634ACS8/LT1634BCS8/ LT1634AIS8/LT1634BIS8 (IR = 20µA) 4.99750 – 0.05 5.000 5.00250 0.05 V % LT1634CCZ (IR = 20µA) 4.99000 – 0.20 5.000 5.01000 0.20 V % Reverse Breakdown Change with Current (Note 3) UNITS LT1634ACS8 (IR = 20µA) ● 4.99400 – 0.12 5.000 5.00600 0.12 V % LT1634AIS8 (IR = 20µA) ● 4.99125 – 0.175 5.000 5.00875 0.175 V % LT1634BCS8 (IR = 20µA) ● 4.98875 – 0.225 5.000 5.01125 0.225 V % LT1634BIS8 (IR = 20µA) ● 498188 – 0.362 5.000 5.01813 0.362 V % LT1634CCZ (IR = 20µA) ● 4.98126 – 0.375 5.000 5.01876 0.375 V % ● 0.3 0.4 1.5 3.0 mV mV ● 2 2 8 10 mV mV 15 µA ppm/°C ppm/°C 20µA ≤ IR ≤ 2mA 2mA ≤ IR ≤ 20mA Minimum Operating Current ● Temperature Coefficient LT1634A, IR = 20µA LT1634B, IR = 20µA Reverse Dynamic Impedance (Note 4) 20µA ≤ IR ≤ 2mA ● ● 4 10 10 25 ● 0.15 0.20 0.75 1.50 Ω Ω Low Frequency Noise (Note 5) IR = 20µA, 0.1Hz ≤ f ≤ 10Hz 35 µVP-P Hysteresis (Note 6) ∆T = – 40°C to 85°C ∆T = 0°C to 70°C 160 40 ppm ppm The ● denotes specifications which apply over the full operating temperature range. Note 1: If the part is stored outside of the specific operating temperature range, the output may shift due to hysteresis. Note 2: ESD (Electrostatic Discharge) sensitive device. Use proper ESD handling precautions. Note 3: Output requires 0.1µF for operating current greater than 1mA. Note 4: This parameter is guaranteed by “reverse breakdown change with current” test. Note 5: Peak-to-peak noise is measured with a single highpass filter at 0.1Hz and 2-pole lowpass filter at 10Hz. Note 6: Hysteresis in output voltage is created by package stress that differs depending on whether the IC was previously at a higher or lower temperature. Output voltage is always measured at 25°C but the IC is cycled to 85°C or – 40°C before successive measurements. Hysteresis is roughly proportional to the square of the temperature change. Hysteresis is not normally a problem for operational temperature excursions where the instrument might be stored at high or low temperature. 5 LT1634 U W 1.25V TYPICAL PERFOR A CE CHARACTERISTICS 10µA 100µA 200µA 500µA 1mA REVERSE VOLTAGE CHANGE (mV) 1.5 6 4 2 0.8 0.4 1.2 REVERSE VOLTAGE (V) 0 1.0 TA = – 40°C TO 85°C REVERSE VOLTAGE CHANGE (mV) TA = – 40°C TO 85°C 8 0.5 0 – 0.5 –1.0 –1.5 –2.0 – 40 1.6 –20 20 40 0 TEMPERATURE (°C) 60 1 TA = 25°C f = 25Hz Forward Characteristics TA = 25°C DYNAMIC IMPEDANCE (Ω) TA = 25°C 1 0.01 10 0.1 1 REVERSE CURRENT (mA) 100 1.2 10000 10 0.1 1 10 REVERSE CURRENT (mA) 1634-1.25 G03 Dynamic Impedance vs Frequency Reverse Dynamic Impedance 100 DYNAMIC IMPEDANCE (Ω) 2 1634-1.25 TA02 1634-1.25 G01 0.1 0.001 3 0 0.01 80 1000 100 10 IR = 10µA COUT = 0.022µF IR = 100µA COUT = 0.47µF 0.8 0.4 IR = 100µA COUT = 0µF 1 0.1 0.01 100 IR = 10µA COUT = 0µF FORWARD VOLTAGE (V) REVERSE CURRENT (µA) 4 2.0 10 0 Reverse Voltage Change vs Current Temperature Drift Reverse Characteristics 0.1 1 10 FREQUENCY (kHz) 1634-1.25 G04 0 0.01 100 0.1 1 10 FORWARD CURRENT (mA) 1634-1.25 G06 1634-1.25 G05 Response Time 0.1Hz to 10Hz Noise 100 Response Time 8 NOISE VOLTAGE (µV/DIV) TA = – 40°C TO 85°C 6 IR = 10µA 4 2 1.5V 0.5V 0V 0.5V 1V OUT 5V 0V 0 –2 –6 –8 0 10 20 30 40 50 TIME (SEC) 60 70 1634-1.25 G07 OUT 0V 5V IN IR = 10µA COUT = 0 –4 6 1.5V 1V 200µs/DIV 1634-1.25 G08 0V IN IR = 10µA COUT = 0.1µF 20ms/DIV 1634-1.25 G09 LT1634 U W 2.5V TYPICAL PERFOR A CE CHARACTERISTICS Reverse Characteristics 6 4 REVERSE VOLTAGE CHANGE (mV) 8 6 4 2 0.5 0 1.5 2.0 1.0 REVERSE VOLTAGE (V) 2.5 3 2 1 0 –1 –2 –3 –4 – 40 0 3.0 TA = – 40°C TO 85°C 10µA 100µA 200µA 500µA 1mA TA = – 40°C TO 85°C REVERSE VOLTAGE CHANGE (mV) 10 –20 20 40 0 TEMPERATURE (°C) 60 Reverse Dynamic Impedance 10 1 0.01 0.1 1 10 REVERSE CURRENT (mA) 100 TA = 25°C IR = 10µA COUT = 0µF 100 IR = 10µA COUT = 0.068µF IR = 100µA COUT = 0.47µF 10 IR = 100µA COUT = 0µF 1 0.1 0.01 0.1 1 10 FREQUENCY (kHz) 100 0.8 0.4 0 0.01 5 0 1634-2.5 G06 3V 3V 2V 2V 1V 1V 0V 0V 5V 5V 0V 0V IR = 10µA COUT = 0 200µs/DIV 100 Response Time –5 –10 0.1 1 10 FORWARD CURRENT (mA) 1634-2.5 G05 Response Time 10 100 1000 0.1Hz to 10Hz Noise TA = – 40°C TO 85°C IR = 10µA 0.1 1 10 REVERSE CURRENT (mA) Forward Characteristics TA = 25°C DYNAMIC IMPEDANCE (Ω) DYNAMIC IMPEDANCE (Ω) 1 1.2 1635-2.5 G04 NOISE VOLTAGE (µV/DIV) 2 Dynamic Impedance vs Frequency TA = 25°C f = 25Hz 15 3 1634-2.5 G03 10000 100 20 4 1634-2.5 G02 1634-2.5 G01 0.1 0.001 5 0 0.01 80 FORWARD VOLTAGE (V) REVERSE CURRENT (µA) Reverse Voltage Change vs Current Temperature Drift 1634-2.5 G08 IR = 10µA COUT = 0.1µF 20ms/DIV 1634-2.5 G09 –15 –20 0 10 20 30 40 50 60 70 80 TIME (SEC) 1634-2.5 G07 7 LT1634 U W 4.096V TYPICAL PERFOR A CE CHARACTERISTICS 6 5 REVERSE VOLTAGE CHANGE (mV) 16 12 8 4 0 4 2 0 –2 –4 –6 – 40 5 2 3 4 REVERSE VOLTAGE (V) 1 20µA 100µA 200µA 500µA 1mA – 20 0 40 20 TEMPERATURE (°C) 1634-4 G01 3 2 1 DYNAMIC IMPEDANCE (Ω) 0.01 0.1 1 10 REVERSE CURRENT (mA) 100 Forward Characteristics TA = 25°C IR = 20µA COUT = 0µF 1000 100 IR = 20µA COUT = 0.033µF 10 IR = 100µA COUT = 0.33µF IR = 100µA COUT = 0µF 1 0.1 0.01 0.1 1 10 FREQUENCY (kHz) 100 0.8 0.4 0 0.01 0.1 1 10 FORWARD CURRENT (mA) 1634-4 G05 1635-4 G04 0.1Hz to 10Hz Noise 100 1.2 TA = 25°C 1 0.1 1 10 REVERSE CURRENT (mA) 1634-4 G03 Dynamic Impedance vs Frequency TA = 25°C f = 25Hz 0.1 0.001 4 0 0.01 80 10000 10 TA = – 40°C TO 85°C 1634-4 G02 Reverse Dynamic Impedance 100 DYNAMIC IMPEDANCE (Ω) 60 FORWARD VOLTAGE (V) REVERSE CURRENT (µA) TA = – 40°C to 85°C REVERSE VOLTAGE CHANGE (mV) 20 0 Reverse Voltage Change vs Current Temperature Drift Reverse Characteristics 100 1634-2.5 G06 Response Time Response Time 40 TA = – 40°C TO 85°C IR = 20µA NOISE VOLTAGE (µV/DIV) 30 6V 20 10 0 4V 6V 4V 2V 2V 0V 0V 10V 10V 0V 0V –10 IR = 20µA COUT = 0 – 20 – 30 – 40 0 10 20 30 40 50 TIME (SEC) 60 70 80 1634-4 G06 8 500µs/DIV 1634-4 G07 IR = 20µA COUT = 0.1µF 20ms/DIV 1634-2.5 G08 LT1634 U W 5V TYPICAL PERFOR A CE CHARACTERISTICS Reverse Characteristics 20 8 5 16 12 8 4 0 2 3 4 REVERSE VOLTAGE (V) 1 5 6 4 2 0 –2 –4 –6 –8 – 40 6 TA = –40°C TO 85°C 20µA 100µA 200µA 500µA 1mA REVERSE VOLTAGE CHANGE (mV) REVERSE VOLTAGE CHANGE (mV) – 20 0 40 20 TEMPERATURE (°C) 60 1634-5 G01 DYNAMIC IMPEDANCE (Ω) DYNAMIC IMPEDANCE (Ω) 1 0.01 0.1 1 10 REVERSE CURRENT (mA) 100 TA = 25°C 1000 IR = 20µA COUT = 0µF 100 10 IR = 100µA COUT = 0µF 1 0.1 0.01 0.1 IR = 20µA COUT = 0.1µF IR = 100µA COUT = 0.22µF 1 10 FREQUENCY (kHz) 100 0.8 0.4 0 0.01 20 10 0 Response Time 6V 4V 6V 2V 2V 0V 0V 10V 10V 0V 0V 4V –10 IR = 20µA COUT = 0 – 20 100 1634-2.5 G06 Response Time TA = – 40°C TO 85°C IR = 20µA 0.1 1 10 FORWARD CURRENT (mA) 1634-5 G05 0.1Hz to 10Hz Noise 100 Forward Characteristics TA = 25°C 10 0.1 1 10 REVERSE CURRENT (mA) 1.2 1635-5 G04 NOISE VOLTAGE (µV/DIV) 1 Dynamic Impedance vs Frequency TA = 25°C f = 25Hz 30 2 1634-5 G03 10000 40 3 1634-5 G02 Reverse Dynamic Impedance 100 0.1 0.001 4 0 0.01 80 FORWARD VOLTAGE (V) REVERSE CURRENT (µA) TA = – 40°C TO 85°C 0 Reverse Voltage Change vs Current Temperature Drift 500µs/DIV 1634-5 G07 IR = 20µA COUT = 0.1µF 20ms/DIV 1634-5 G08 –30 – 40 0 10 20 30 40 50 TIME (SEC) 60 70 80 1634-5 G06 9 LT1634 U U W U APPLICATIONS INFORMATION The reverse characteristics of the LT1634 behave like a resistor in parallel with a Zener diode. This simple, well behaved characteristic is important to the proper operation of circuits like Figure 1. The adjustable output voltage reference depends upon positive feedback from the LT1495’s output to start-up and regulate the bias current for the LT1634. VIN ≥ 10.5V – 1.25V V RB = OUT 10µA + VOUT 1.5V TO 10V LT1495 LT1634-1.25 – R1 50k TO 1.75M R2 250k 1634 F01 Figure 1. Adjustable Output Voltage Reference U TYPICAL APPLICATIONS Reference for Micropower A/D Converter 5V VIN 18k LTC1286 1 2 LT1634-4.096 0.1µF 3 4 VREF VCC + IN CLK – IN DOUT 8 5V 7 0.1µF µC/µP SERIAL INTERFACE 6 5 GND CS/SHDN 1634 TA03 The LT1634-5 Generates the LTC1448 Dual 12-Bit DAC’s Reference and Supply Voltage 7.5V TO 12V 3.48k LTC1448 1 LT1634-5 µC/µP SERIAL INTERFACE 2 3 4 0.1µF 10 CLK VOUTB DIN VCC CS/LD REF GND VOUTA 8 VOUTB 7 6 5 0.1µF VOUTA 1634 TA04 LT1634 U PACKAGE DESCRIPTION Dimensions in inches (millimeters) unless otherwise noted. MS8 Package 8-Lead Plastic MSOP (LTC DWG # 05-08-1660) 0.118 ± 0.004* (3.00 ± 0.102) 0.040 ± 0.006 (1.02 ± 0.15) 0.007 (0.18) 0.034 ± 0.004 (0.86 ± 0.102) 8 7 6 5 0° – 6° TYP SEATING PLANE 0.012 (0.30) 0.0256 REF (0.65) TYP 0.021 ± 0.006 (0.53 ± 0.015) 0.006 ± 0.004 (0.15 ± 0.102) 0.118 ± 0.004** (3.00 ± 0.102) 0.192 ± 0.004 (4.88 ± 0.10) MSOP (MS8) 1197 1 * DIMENSION DOES NOT INCLUDE MOLD FLASH, PROTRUSIONS OR GATE BURRS. MOLD FLASH, PROTRUSIONS OR GATE BURRS SHALL NOT EXCEED 0.006" (0.152mm) PER SIDE ** DIMENSION DOES NOT INCLUDE INTERLEAD FLASH OR PROTRUSIONS. INTERLEAD FLASH OR PROTRUSIONS SHALL NOT EXCEED 0.006" (0.152mm) PER SIDE 2 3 4 S8 Package 8-Lead Plastic Small Outline (Narrow 0.150) (LTC DWG # 05-08-1610) 0.189 – 0.197* (4.801 – 5.004) 0.010 – 0.020 × 45° (0.254 – 0.508) 0.008 – 0.010 (0.203 – 0.254) 0.053 – 0.069 (1.346 – 1.752) 7 8 0.004 – 0.010 (0.101 – 0.254) 6 5 0°– 8° TYP 0.016 – 0.050 0.406 – 1.270 0.050 (1.270) TYP 0.014 – 0.019 (0.355 – 0.483) 0.150 – 0.157** (3.810 – 3.988) 0.228 – 0.244 (5.791 – 6.197) *DIMENSION DOES NOT INCLUDE MOLD FLASH. MOLD FLASH SHALL NOT EXCEED 0.006" (0.152mm) PER SIDE **DIMENSION DOES NOT INCLUDE INTERLEAD FLASH. INTERLEAD FLASH SHALL NOT EXCEED 0.010" (0.254mm) PER SIDE SO8 0996 1 2 3 4 Z Package 3-Lead Plastic TO-92 (Similar to TO-226) (LTC DWG # 05-08-1410) 0.060 ± 0.005 (1.524± 0.127) DIA 0.180 ± 0.005 (4.572 ± 0.127) 0.180 ± 0.005 (4.572 ± 0.127) 0.060 ± 0.010 (1.524 ± 0.254) 0.90 (2.286) NOM 0.140 ± 0.010 (3.556 ± 0.127) Z3 (TO-92) 0695 0.500 (12.70) MIN 0.050 ± 0.005 (1.270 ± 0.127) 0.050 UNCONTROLLED (1.270) LEAD DIMENSION MAX 0.016 ± 0.003 (0.406 ± 0.076) 5° NOM 10° NOM 0.015 ± 0.002 (0.381 ± 0.051) Information furnished by Linear Technology Corporation is believed to be accurate and reliable. However, no responsibility is assumed for its use. Linear Technology Corporation makes no representation that the interconnection of its circuits as described herein will not infringe on existing patent rights. 11 LT1634 U TYPICAL APPLICATIONS Single Cell Li-Ion Battery Supervisory Circuit (IQ = 20µA) OFF CHARGER VBAT SW T0 LOAD 1.75V – A2 1/4 LT1496 RS 51k 5% + + A1 1/4 LT1496 R1 500k 0.1% – 1.25V VBAT + A3 1/4 LT1496 RH1 10M 5% D1 RH2 10M 5% D2 A RSW 1M 5% BATTERY – A4 1/4 LT1496 – + R2 1.25M 0.1% LT1634-1.25 R3 1.75M 0.1% R4 1.25M 0.1% 1634 TA05 D1, D2: 1N458 R1 TO R4: CAR6 SERIES IRC (512) 992-7900 Micropower Voltage and Current Reference R3 249k 0.1% 2 AAA ALKALINE CELLS R4 24k 5% – ZTX214C 1/2 LT1495 R1 TO R3: MAR5 SERIES, IRC (512) 992-7900 + 1/2 LT1495 + – LT1634 1.25V IOUT = 1µA COM VOUT = 1.5V R1 200k 0.1% R2 1M 0.1% 1634 TA06 RELATED PARTS PART NUMBER DESCRIPTION COMMENTS LTC1440 Micropower Comparator with Reference 3.7µA Max Supply Current, 1% 1.182V Reference, MSOP, PDIP and SO-8 Packages LT1460 Micropower Series Reference 0.075% Max, 10ppm/°C Max Drift, 2.5V, 5V and 10V Versions, MSOP, PDIP, SO-8, SOT-23 and TO-92 Packages LT1495 1.5µA Precision Rail-to-Rail Dual Op Amp 1.5µA Max Supply Current, 100pA Max IOS LTC1540 Nanopower Comparator with Reference 600nA Max Supply Current, 2% 1.182V Reference, MSOP and SO-8 Packages 12 Linear Technology Corporation 1634fa LT/TP 0698 2K REV A • PRINTED IN USA 1630 McCarthy Blvd., Milpitas, CA 95035-7417 (408)432-1900 ● FAX: (408) 434-0507 ● www.linear-tech.com LINEAR TECHNOLOGY CORPORATION 1998